微电网混合储能系统设计

A design for hybrid energy storage system of micro-grid

微电网中的光伏、风力及其他电源受外界条件影响不够稳定,将蓄电池和超级电容组成的混合系统应用于微电网能有效增强微电网的稳定性。DC/DC双向变换器,通过多滞环和PID控制可以将蓄电池和超级电容并联起来;将SVPWM技术和改进解耦应用于储能系统的并网系统中,SVPWM技术有效利用了直流电压,改进解耦控制方法减少了电网谐波含量和系统响应时间。将这些方法组合应用于储能系统的并网,提高微电网的稳定性。

Because of the conditional instability, the voltage of photovoltaic cells, wind power generators and the other sources in micro-grid is lack of stability. The hybrid storage system consists of super-capacitor and battery improves the stability of micro-grid. The bi-directional DC/DC converter can parallel the super-capacitor and battery effectively through multi-loop hysteresis control and PID control. The SVPWM technology applied in grid-connected system uses the DC voltage effectively. The improved decoupling control reduces the harmonics in grid and the response time of the system. Combining these methods and applying them to energy storage systems can improve the stability of micro-grid.